1957 Pacific Southwest Championships
Date	September 13–22
Edition	31st
Category	Amateur
Surface	Hard / outdoor
Location	Los Angeles, California, U.S.
Venue	Los Angeles Tennis Club
Champions
Men's singles
Vic Seixas
Women's singles
Althea Gibson
Men's doubles
Ashley Cooper / Neale Fraser
Women's doubles
Althea Gibson / Darlene Hard
Mixed doubles
Mary Bevis Hawton / Robert Howe
← 1956 · Pacific Southwest Open · 1958 →

The 1957 Pacific Southwest Championships was a combined men's and women's amateur tennis tournament played on outdoor hard courts at the Los Angeles Tennis Club in Los Angeles, California in the United States. It was the 31st edition of the tournament and took place from September 13 through September 22, 1957. Vic Seixas and Althea Gibson won the singles titles.^[1][2]

Vic Seixas defeated Gilbert Shea 9–7, 6–3, 6–4

Althea Gibson defeated Louise Brough 6–3, 6–1

Ashley Cooper / Neale Fraser defeated Budge Patty / Vic Seixas 3–6, 5–7, 13–11, 13–11, 6–3

Althea Gibson / Darlene Hard defeated Mary Bevis Hawton / Janet Hopps 6–2, 6–4

Mary Bevis Hawton / Robert Howe defeated Darlene Hard / Mike Davies 6–3, 6–4